Skip to content

Respects to prj2epsg.org

Compare
Choose a tag to compare
@chadrockey chadrockey released this 25 May 02:32

All of the heavy lifting of figuring out where the lidar data is on the planet was done by a website called prj2epsg.org. It looks like this website was a causality of covid and will no longer be supported.

We had a few other options to confirm and validate the EPSG values such as spatialreference.org, but no other site really supports handling malformed PRJ sidecar files or other metadata commonly included with the lidar.

This update officially removes EPSG verification and automatic selection for almost all situations. It's expected that users will now almost 100% of the time find the correct EPSG on their own.

The support page for asking for help is on the TGC Tours forum:
https://tgctours.proboards.com/thread/18202/help-asking-me-epsg-code

This is the best way to find EPSG without guessing:
https://tgctours.proboards.com/thread/18332/brave-adventurers-seriously-find-epsg

I really dislike users guessing EPSG because the elevation height references (ellipsoids) or unit offsets could be slightly off and you'd never really know, but your course will be wrong in subtle ways.